I can earn you can earn he can earn we can earn you can earn they can earn
V-ing form
I can be earning you can be earning he can be earning we can be earning you can be earning they can be earning
Perfect
I can have earned you can have earned he can have earned we can have earned you can have earned they can have earned
V-ing perfect
I can have been earning you can have been earning he can have been earning we can have been earning you can have been earning they can have been earning
Negation
Simple form
I cannot earn you cannot earn he cannot earn we cannot earn you cannot earn they cannot earn
V-ing form
I cannot be earning you cannot be earning he cannot be earning we cannot be earning you cannot be earning they cannot be earning
Perfect
I cannot have earned you cannot have earned he cannot have earned we cannot have earned you cannot have earned they cannot have earned
V-ing perfect
I cannot have been earning you cannot have been earning he cannot have been earning we cannot have been earning you cannot have been earning they cannot have been earning
Interrogative form
Simple form
can I earn? can you earn? can he earn? can we earn? can you earn? can they earn?
V-ing form
can I be earning? can you be earning? can he be earning? can we be earning? can you be earning? can they be earning?
Perfect
can I have earned? can you have earned? can he have earned? can we have earned? can you have earned? can they have earned?
V-ing perfect
can I have been earning? can you have been earning? can he have been earning? can we have been earning? can you have been earning? can they have been earning?
Interro-negative form
Simple form
can I not earn? can you not earn? can he not earn? can we not earn? can you not earn? can they not earn?
V-ing form
can I not be earning? can you not be earning? can he not be earning? can we not be earning? can you not be earning? can they not be earning?
Perfect
can I not have earned? can you not have earned? can he not have earned? can we not have earned? can you not have earned? can they not have earned?
V-ing perfect
can I not have been earning? can you not have been earning? can he not have been earning? can we not have been earning? can you not have been earning? can they not have been earning?